Anti-overflow toilet with an internal diverting wall diverting flush water from a secondary drain inlet

ABSTRACT

A toilet includes a bowl including a supply water plenum providing the water to the basin, a primary drain fluidly connecting and terminating at a drain passage and a secondary drain fluidly connecting the supply water plenum to the sewer drainage pipe. The secondary drain is separate from the primary drain and includes at least one secondary drain inlet that is disposed within the supply water plenum, a second drain channel, and a second drain outlet. The inlet permits rising waste water to flow from the supply water plenum into the second drain channel and out of the second drain outlet to the sewer drainage pipe separately from the waste water of the primary drain. The supply water plenum also includes a diverting wall located upstream of the secondary drain inlet configured to divert water flowing from upstream from flowing into the inlet.

CROSS REFERENCE TO RELATED APPLICATIONS

This disclosure is a continuation-in-part of U.S. patent applicationSer. No. 14/809,684 filed on Jul. 27, 2015 which claims priority to andthe benefit of U.S. Provisional Application No. 62/029,810 filed on Jul.28, 2014, both of which are hereby incorporated by reference.

TECHNICAL FIELD

This disclosure relates to an improved bathroom fixture for flushingbodily waste materials into a drainage or sewer system. Moreparticularly, this disclosure includes a toilet having a secondarydrainage system that prevents the fixture from overflowing.

BACKGROUND

The statements in this section merely provide background informationrelated to the present disclosure. Accordingly, such statements are notintended to constitute an admission of prior art.

Traditional bathroom fixtures, such as toilets and urinals, may becomeblocked or plugged-up resulting in the flushing water and waste tooverflow when the fixture is flushed. Obviously, this overflow of waterand waste materials is undesirable and there is therefore a need for animproved bathroom fixture that prevents these overflows from occurring.

There have been previous attempts to prevent a blocked toilet fromoverflowing. These prior art anti-overflow devices are often complicatedand require modification to existing plumbing within the house orbuilding.

Generally known prior art fails to provide for a simple andcost-effective means for preventing bathroom fixtures from overflowingwhile being readily installed in place of an existing model toilet orurinal without modification to the plumbing of the building.

Manufacturing of traditional one piece ceramic toilet fixtures iscomplicated and prone to manufacturing waste. In particular, the primarydrain necessarily twists and turns within the fixture. The process offorming this internal twisting cavity within the toilet and then bakingthe fixture to harden the ceramic material is expensive and prone tomanufacturing defects. Significant manufacturing efficiency andreduction in occurrence of mis-formed fixtures can be achieved bymanufacturing the primary drain separately from the rest of the fixture.

SUMMARY

A toilet includes a bowl including a supply water plenum providing thewater to the basin, a primary drain fluidly connecting and terminatingat a drain passage and a secondary drain fluidly connecting the supplywater plenum to the sewer drainage pipe. The secondary drain is separatefrom the primary drain and includes at least one secondary drain inletthat is disposed within the supply water plenum, a second drain channel,and a second drain outlet. The inlet permits rising waste water to flowfrom the supply water plenum into the second drain channel and out ofthe second drain outlet to the sewer drainage pipe separately from thewaste water of the primary drain. The supply water plenum also includesa diverting wall located upstream of the secondary drain inletconfigured to divert water flowing from upstream from flowing into theinlet.

BRIEF DESCRIPTION OF THE DRAWINGS

One or more embodiments will now be described, by way of example, withreference to the accompanying drawings, in which:

FIG. 1 illustrates an exemplary toilet fixture configured to receive adetachable primary drain and a detachable secondary drain, in accordancewith the present disclosure;

FIG. 2 illustrates an exemplary detachable primary and secondary drainassembly, in accordance with the present disclosure;

FIG. 3 illustrates the detachable primary and secondary drain assemblyof FIG. 2 attached to the toilet fixture of claim 1, in accordance withthe present disclosure;

FIG. 4 illustrates an exemplary alternative embodiment of a toiletfixture and secondary drain connection, with the secondary drainconnecting directly to the toilet bowl, in accordance with the presentdisclosure;

FIG. 5 illustrates an exemplary alternative embodiment of a detachableprimary and secondary drain assembly, with a secondary drain connectionbeing plugged, in accordance with the present disclosure;

FIG. 6 illustrates an exemplary alternative embodiment of a detachableprimary and secondary drain assembly including a valve configured toprovide selective blockage of a secondary drain tube, in accordance withthe present disclosure;

FIG. 7 illustrates an alternative embodiment of a toilet fixtureconfigured to receive a detachable secondary drain, the fixtureincluding a flow diverting wall configured to channel a portion of aflushing flow within a supply water plenum away from the secondary drainwithout preventing backed up water from entering the secondary drain, inaccordance with the present disclosure.

FIG. 8 illustrates an exemplary toilet fixture including a one-piececeramic fixture including a secondary drain inlet located within asupply water plenum, the supply water plenum including a diverting wallsimilar to the diverting wall of FIG. 7 configured to channel a portionof a flushing flow within a supply water plenum away from the secondarydrain without preventing backed up water from entering the secondarydrain, in accordance with the present disclosure;

FIG. 9 illustrates in detail water flowing through a supply waterplenum, the water being supplied from a tank to a water jet flushing thefixture, the water being channeled past a secondary drain inlet hole bya diverting wall such that only a minor portion of the water flow entersthe secondary drain inlet, in accordance with the present disclosure;

FIG. 10 illustrates in detail the supply water plenum of FIG. 9, with aback-up flow of water entering the plenum and entering the secondarydrain inlet, in accordance with the present disclosure;

FIG. 11 illustrates an alternative exemplary embodiment of the toiletfixture of FIG. 8, further comprising a hole connecting the bowl of thetoilet to the supply water plenum and a wall projecting downward overthe hole, shielding the hole from water rushing from the tank of thetoilet to the bowl of the toilet, in accordance with the presentdisclosure;

FIG. 12 illustrates the toilet fixture of FIG. 11, with water flushingfrom the tank of the toilet to the bowl of the toilet, with the wallshielding the hole connecting the bowl to the supply water plenum fromthe water rushing through the supply water plenum, in accordance withthe present disclosure; and

FIG. 13 illustrates the toilet fixture of FIG. 11, with water backing upthrough the supply water plenum through both a bottom of the supplywater plenum and through the hole connecting the bowl to the supplywater plenum, in accordance with the present disclosure.

DETAILED DESCRIPTION

Referring now to the drawings, wherein the showings are for the purposeof illustrating certain exemplary embodiments only and not for thepurpose of limiting the same, an improved toilet is disclosed. A toiletcan include a toilet fixture, a detachable primary drain, and adetachable secondary drain. One can create a toilet fixture, constructedof exemplary ceramic, including at least a toilet bowl and a primarydrain interface. A detachable primary drain can be securely attached tothe primary drain interface at one of the primary drain and at a sewerpipe or collar apparatus of a sewer pipe at the other end. Thedetachable primary drain includes a primary trap configured to sealsewer gases from exiting the sewer pipe and to create a siphon flushingaction in the toilet. The toilet fixture can further include a secondarydrain hole or secondary drain inlet. Such a hole or inlet can beconnected to a secondary drain which connects the toilet fixture to thesewer pipe separately from the primary drain. Water in the toiletfixture, under certain conditions such a clog in the primary drain, canexit the fixture entirely separately from the primary drain.

The sewer pipe or the collar for the sewer pipe can be installed withthe end of the sewer pipe or the collar thereof presenting a flat orsubstantially flat surface with the opening in a horizontal planarorientation for a toilet fixture to be installed thereto, with a waxring typically being compressed between the fixture and sewer pipe. Theprimary drain includes an outlet which can extend past a top surface oran opening of the sewer pipe such that liquids leaving the primary drainempty directly into the sewer pipe. Similarly, the secondary drainincludes an outlet which can extend past a top surface or opening of thesewer pipe. The primary drain outlet and secondary drain outlet can beentirely separate tubes extending into the sewer line. In anotherexample, for example, when the primary drain and secondary drain areunitarily formed, the primary drain outlet and the secondary drainoutlet each can empty separately into the sewer pipe, however with adividing wall separating the primary drain outlet and the secondarydrain outlet not necessarily extending past the entrance to the sewerpipe.

A secondary drain hole or secondary drain inlet can be formed inmultiple or alternative locations within the toilet. Such a secondarydrain hole or inlet should be above a normal full line for the toilet orthe water level at which the water is intended to refill to after aflush. The secondary drain hole or inlet can be located within thetoilet bowl, drawing water from the toilet bowl into the secondary drainand preventing the water from overflowing from the rim of the toilet.The secondary drain can alternatively be located to an internalpassageway within the toilet which delivers water from a water tank orwater supply line to the toilet bowl. Such an internal passageway can betermed a supply water plenum. The supply water plenum can, in normaloperation, supply water from the water tank to holes located around therim of the toilet bowl, to a water jet located at a bottom of the toiletbowl and configured to provide a flushing stream of water into theprimary drain, or both. It will be appreciated that water backing up ina toilet bowl due to a clogged primary drain will additionally cause awater level to rise within the supply water plenum. A secondary draininlet or hole located in the supply water plenum will remove water fromthe toilet fixture and prevent water from overflowing from the rim ofthe toilet.

FIG. 1 illustrates an exemplary toilet fixture configured to receive adetachable primary drain and a detachable secondary drain. Theillustrated toilet fixture 10 can be constructed of exemplary ceramic.Fixture 10 includes a water tank 12 and a toilet bowl 14. Toilet bowl 14connects at a lower portion to primary drain interface 16. Primary draininterface 16 can be a smooth cylindrical male-type fitting configured toaccept a female-type fitting over the primary drain interface. Inanother embodiment, primary drain interface 16 can include annularridges making retention of female-type fitting more effective. In otherembodiments, primary drain interface 16 include a female-type fittingconfigured to interface with a male-type fitting connected to thedetachable primary drain. The connection of the primary drain to theprimary drain interface 16 must be secure and watertight and can includea band-clamp, adhesive or a bonding agent, or any other similar deviceor material configured to sealingly joint two pipe sections. Fixture 10further includes a secondary drain hole 18 configured to permit water toflow out of the fixture separately from the primary drain interface.Secondary drain hole 18 can open to bowl 14 or an internal passagewithin the toilet such as a supply water plenum.

Primary drain interface 16 and secondary drain hole 18 can be connectedto a separate primary drain tube and a separate secondary drain tube. Insuch an embodiment, the separate drain tubes can optionally be fixturedtogether along the tubes or near one or both ends of the tubes. In analternative embodiment, FIG. 2 illustrates an exemplary detachableprimary and secondary drain assembly wherein the primary drain tube andthe secondary drain tube are connected together or formed unitarily as asingle piece. Detachable primary and secondary drain assembly 20 isillustrated including primary drain tube 22 and secondary drain tube 24.Primary drain tube 22 includes female-type connector 30 configured to besealingly secured to the primary drain interface 16 of FIG. 1. Primarydrain tube 22 further includes trap portion 32 and primary drain outlet26. Secondary drain tube 24 includes a secondary drain inlet 36configured to be sealingly attached to secondary drain hole 18 of FIG. 1and includes features 38 configured to aid in retention of the secondarydrain tube 24 within the secondary drain hole 18. Further, adhesive orbonding agents known in the plumbing art can be used to seal and securethe connection and similarly any connections described herein. Secondarydrain tube 24 further includes trap 34 and secondary drain outlet 28.Primary drain tube 22 and secondary drain tube 24 are connected along asubstantial majority of their respective lengths. In one embodiment, twoseparate tubes can be adhered or bonded together. In another embodiment,two separate tubes can be bracketed or fastened together. In anotherembodiment, the two tubes can be molded as a single unitary piecethrough methods known in the art for plastics or polymer formation. Inone embodiment, the unitary assembly can be molded in halves, providinghalf channels in each half as semi-circular depressions, with the halvescoming together to form the circular tubes. The tubes can be made out ofany material known for use in the plumbing arts for use on a sewer pipe.Primary drain outlet 26 and secondary drain outlet 28 are sealinglyconnected to a sewer pipe interface grommet 40 configured to be securedto an open sewer pipe. Grommet 40 serves a purpose of fixturing theprimary and secondary drains to the sewer pipe and additionally to sealagainst the sewer pipe and prevent any leakage from sewer pipe.

FIG. 3 illustrates in cross section the detachable primary and secondarydrain assembly of FIG. 2 attached to the toilet fixture of claim 1. Theillustrated toilet fixture includes a water tank 12, a toilet bowl 14,and a supply water plenum 13 providing a path for water to flow to holesaround rim 11, to jet outlet 15, or both. Detachable primary andsecondary drain assembly 20 is illustrated attached to primary draininterface 16 with female-type connector 30 and attached to secondarydrain hole 18 with features 38. Primary drain outlet 26, secondary drainoutlet 28, and grommet 40 are illustrated provided upon a bottom surfaceof the fixture corresponding to where the fixture will line up with asewer pipe during and after installation.

As illustrated in FIG. 3, a secondary drain can connect directly with asupply water plenum 13. In another embodiment, where the supply waterplenum only connects directly to holes around the rim of the toilet, thesecondary drain can connect directly with the bowl of the toilet. FIG. 4illustrates an exemplary alternative embodiment of a toilet fixture andsecondary drain connection, with the secondary drain connecting directlyto the toilet bowl through the supply water plenum. The illustratedtoilet fixture includes holes 118 and 117 formed in a wall of the supplywater plenum 113 and a wall dividing the supply water plenum 113 and thetoilet bowl 114, respectively. Secondary drain tube 124 is illustratedextending through hole 118, plenum 113, and hole 117 to present asecondary drain opening directly to the toilet bowl 114. Features 138and 139 are formed on secondary drain tube 124 to aid in sealing withholes 118 and 117, respectively. Adhesive or a bonding agent can be usedto seal the connections between the fixture and the secondary drain tube124. A hole 125 can be located on a portion of secondary drain tube 124that is between holes 117 and 118, permitting a small amount of flushingwater to enter the secondary drain tube 124 to flush out the tube and tokeep the trap filled with water and further to aid in draining backed upwater from the supply water plenum 113. Hole 125 could be initiallysealed or selectively sealed according to methods known in the art foroptional use with toilet fixtures without supply water plenums extendingdownward along the side of the toilet bowl 114.

FIG. 5 illustrates an exemplary alternative embodiment of a detachableprimary and secondary drain assembly, with a secondary drain connectionbeing plugged. Toilet fixture 10 is illustrated, with detachable primaryand secondary drain assembly 20 attached thereto. A secondary drainincluding features 38 are installed and sealingly connected to fixture10. An optional plug 50 is illustrated sealing the opening to thesecondary drain. Through use of plug 50, the secondary drain can be anoptional feature provided with the toilet, while still permitting all ofthe detachable primary and secondary drain assemblies 20 to be made withthe same manufacturing tooling or process. Plug 50 can be added as apost process to manufacturing assembly 20.

FIG. 6 illustrates an exemplary alternative embodiment of a detachableprimary and secondary drain assembly including a valve configured toprovide selective blockage of a secondary drain tube. Fixture 10 isillustrated, with detachable primary and secondary drain assembly 220attached thereto. Under certain circumstances, for example to facilitateeffective plunging of the toilet fixture, it can be advantageous to beable to stop flow through a secondary drain tube. Secondary drain valve230 including a secondary drain handle 232 is illustrated upon thesecondary drain tube. Valve 230 can operate as a ball valve or any otherknown valve type in the art. Under normal operation, drain handle 232can be oriented to permit normal flow through the secondary drain. Whenflow through the secondary drain is undesirable, the user can turn drainhandle 232 to a closed position, thereby preventing flow through thesecondary drain.

FIG. 8 is a cross-sectional view of an exemplary anti-overflow fixturewherein a hole internal to a supply water plenum provides a secondarydrain to a fixture. Configuration 400 is similar to the toilet fixturesdisclosed herein including a detachable primary and secondary drainassembly except that the toilet bowl and the primary and secondarydrains are formed unitarily of a single piece of ceramic. Configuration400 includes fixture 410 with a water tank 450, a bowl 412, and aprimary drain 420. Water is held in water tank 450 by tank valve 454.Once tank valve 454 is opened, water rushes according to the pull ofgravity through tank hole 452 and enters supply water plenum 460 offixture 410. In another embodiment, a flushometer-type valve can be usedwith a tank-less toilet, wherein depression of the valve causes a surgeof water to enter supply water plenum 460. A wide variety of toiletdesigns are envisioned for use with the configurations disclosed herein,and the disclosure is not intended to be limited by the particularexamples provided. Supply water plenum 460 receives the flow of waterfrom tank 450 and channels the water flow to different destinations forthe purpose of flushing the fixture, emptying contents of the bowl, andrefilling the bowl after the flush. A portion of the water flow withinsupply water plenum 460 is channeled to a channel 413 circumventing therim of bowl 412. Water within channel 413 flows through holes 414 andinto bowl 412. A portion of the water flow within supply water plenum460 is channeled through passage 462 which progresses around the bowland fluidly connects with jet channel 464. Water exits jet channel 464through water jet hole 466 to provide flushing action/head pressure toprimary drain 420 at primary drain inlet 422. Water and waste from bowl412 and water from jet channel 464 enter primary drain 420 and flushthrough the primary drain 420 as the column of water and waste create asiphon in accordance with operation of a fixture as is known in the art.The water and waste exit the fixture through primary drain outlet 424.Primary drain outlet 424 is coupled to a structure sewage pipechanneling the waste to other sewage pipes and subsequently out of thestructure.

A secondary drain inlet 470 is illustrated within supply water plenum460. One having skill in the art will appreciate that the primary drain420 and bowl 412 are configured such that during normal operation, waterfills in the bowl 412 until a corresponding water level 465 withinprimary drain 420 causes water filling fixture to overflow the bend inprimary drain 420. In this way, a normal water level for the bowl 412 toachieve during a filling cycle of the fixture is set. Because acorresponding water level also fills within supply water plenum 460, itis noted that any secondary drain outlet 470 should be located above thebend in primary drain 420 such that water will not drain from the watersupply plenum 460 through the secondary drain when the bowl is filled toa normal designed level. However, the secondary drain inlet 470 can belocated within a low inlet range 434 above the water level 465 but lessthan some threshold distance from water level 465. In this way, as soonas the water level in the fixture goes above water level 465, waterbegins immediately to drain through the secondary drain. In this way,the secondary drain has an enhanced ability to keep the water fromoverflowing bowl 412. In one embodiment, the threshold distance abovewater level 465 can be one inch. In another embodiment, the thresholddistance above water level 465 can be two inches. In another embodiment,the threshold distance above water level 465 can be three inches.

Further, secondary drain inlet 434 can be made larger than a secondarydrain hole in a unit without a diverting wall. A normal secondary draininlet must be kept small to avoid too much water flowing through supplywater plenum from the tank to the water jet from being diverted to thesecondary drain. Diverting wall 432 is located above secondary draininlet 470. Such a wall can be perpendicular to the flow of the waterthrough the plenum. Such a wall can alternatively be tilted or curvedeither upstream or downstream to the flowing water. In the alternative,the wall of the fixture can be indented in the area above inlet 470 tosimilarly divert flowing water away from inlet 470. However, no wall ordiverting structure is located downstream of inlet 470. As a result,water flowing into the supply water plenum 460 from the jet channel 464can freely access and drain through inlet 470 into the secondary drain.In one embodiment, secondary drain inlet 470 can be at least ½ inch indiameter/½ inch wide. In another embodiment, secondary drain inlet 470can be at least one inch in diameter/one inch wide. In one embodiment,secondary drain inlet 470 can be at least 1 and ½ inch in diameter 1 and½ inch wide. It will be understood that these values are provided asexamples, and the actual values used in the disclosed devices can belarger or smaller than the provided examples.

Secondary drain inlet 470 is fluidly connected to secondary drainchannel 430. A channel can travel integrally within fixture 410 toconnect the secondary drain inlet 470 and the secondary drain channel430. A channel connecting the secondary drain inlet 470 and thesecondary drain channel 430 can include a water trap according toplumbing methods known in the art. Water within secondary drain channel430 can exit the fixture through secondary drain outlet 440. In anotherembodiment, secondary drain channel 430 can be configured to empty intothe primary drain 420 just above primary drain outlet 424. Primary drainoutlet 424 and secondary drain outlet 440 can be configured to connectto a standard plumbing connection known in the art. In such anembodiment, secondary drain outlet 440 can be configured to extendthrough a collar region of the fixture and discharge water directly intothe standard plumbing connection. Water can be channeled from supplywater plenum 460 into secondary drain inlet 470 for the purpose offlushing the secondary drain and cleaning it out.

If a clog in primary drain 420 prevents water and waste from exitingbowl 412, the water level in bowl 412 rises. One having skill in the artwill appreciate that as the water level in bowl 412 rises, a water levelwithin the supply water plenum 460 will also rise. As the water levelwithin the plenum reaches and enters secondary drain inlet 470, flows tosecondary drain channel 430, and flows out of secondary drain outlet440. By flowing through the secondary drain, water from the supply waterplenum 460 bypasses the clog in the primary drain 420 and prevents thefixture from overflowing out of the bowl.

One or more than one secondary drain inlet 470 can be used to channelwater from the supply water plenum 460.

Secondary drain holes can be formed integrally with the wall during theprocess of constructing the fixture, for example, prior to the porcelainmaterial being heated, or the secondary drain holes can be added to thewalls of the fixture through a drilling process after the constructionof the fixture.

The embodiment of FIG. 8 includes jet channel 464. Some toilet fixturesinclude a water jet channel and some do not. A secondary drain inletwithin a supply water plenum can still work within a fixture whereinwater only enters the bowl through holes around the rim. However, waterfrom the rising level in the bowl will not enter the plenum until thewater level exceeds the height of the holes around the rim. In such aexemplary configuration, larger holes around the rim and/or a portion ofholes around the rim placed lower in the bowl could facilitate waterflowing from a bowl back into the plenum before the water level gets toohigh in the bowl. In a fixture without a water jet channel, the improvedconfiguration of the secondary drain inlet 470 would drain water fromplenum 460 faster than would the configuration of FIG. 1.

FIG. 9 illustrates in detail water flowing through a supply water plenumas illustrated in FIG. 8, the water being supplied from a tank to awater jet flushing the fixture, the water being channeled past asecondary drain inlet hole such that only a minor portion of the waterflow enters the secondary drain inlet hole. Supply water plenum 460 isillustrated including channel 413, jet channel 464, and water jet hole466 supplying a water flow 480 to primary drain inlet 422. Divertingwall 432 is illustrated diverting water away from secondary drain inlet470 or shielding water from a normal flush event from going into inlet470, permitting some water to enter inlet 470 but reducing the amount ofwater as compared to how much would flow into inlet 470 if divertingwall 432 were not in place.

FIG. 10 illustrates in detail the supply water plenum of FIG. 9, with aback-up flow of water entering the plenum and entering the secondarydrain inlet hole. Supply water plenum 460 is illustrated including jetchannel 464, and water jet hole 466 supplying a water flow 490 backingup from primary drain inlet 422 into jet channel 464. While divertingwall 432 is illustrated above secondary drain inlet 470, flow 490 isunaffected by diverting wall 432 and can drain freely into secondarydrain inlet 470.

FIG. 7 illustrates an alternative embodiment of a toilet fixtureconfigured to receive a detachable secondary drain, the fixtureincluding a flow diverting wall configured to channel a portion of aflushing flow within a supply water plenum away from the secondary drainwithout preventing backed up water from entering the secondary drain.Toilet fixture 310 includes a supply water plenum 313. Detachableprimary and secondary drain assembly 20 is illustrated, with features 38attached to a secondary drain hole in fixture 310. Within the supplywater plenum 313, a diverter wall 315 can be used to divert a portion ofwater traveling from a water tank to the toilet bowl while not impedingbacked up water within plenum 313 from entering the secondary drain.

In an alternative embodiment, the diverter wall can be formed as anelongated section on the end of the secondary drain tube extending intothe toilet fixture. This elongated section, for example, can be a toparcuate portion of the tube (e.g. a half cylinder) extending through thesecondary drain hole and into the plenum, preventing water flowing fromabove the secondary drain hole from entering the secondary drain tube.

Any of the embodiments disclosed herein can be configured such that thesecondary drain entirely bypasses the primary drain and discharges pasta collar of the fixture and directly into sewage pipes.

FIG. 11 illustrates an alternative exemplary embodiment of the toiletfixture of FIG. 8, further comprising a hole connecting the bowl of thetoilet to the supply water plenum and a wall projecting downward overthe hole, shielding the hole from water rushing from the tank of thetoilet to the bowl of the toilet. A toilet fixture including a supplywater plenum 560 is illustrated. Once a tank valve for the fixture isopened, water rushes according to the pull of gravity through a tankhole and enters supply water plenum 560. Supply water plenum 560receives the flow of water from the tank and channels the water flow todifferent destinations for the purpose of flushing the fixture, emptyingcontents of the bowl, and refilling the bowl after the flush. AA portionof the water flow within supply water plenum 560 is channeled throughpassage 562 which progresses around the bowl and fluidly connects with ajet channel issuing a jet of water in a bottom of the bowl toward anopening of the primary drain tube to provide flushing action/headpressure to the primary drain.

A secondary drain inlet 570 is illustrated within supply water plenum560. Secondary drain inlet 570 can take a number of forms, for example,including one larger hole or a plurality of smaller holes. In oneexample, secondary drain inlet 570 can include two or three holeslocated just below diverting wall 532. Such holes can be placed side byside, for example, aligned laterally along a bottom side of wall 532.

Hole 575 is illustrated connecting the bowl of the toilet to supplywater plenum 560. When water backs up within the bowl, water can flowfrom the bowl directly to the supply water plenum, thereby aiding instopping backing up water from overflowing the toilet bowl. A wall 572is provided starting above hole 575 and extending downward behind hole575, thereby shielding the hole from water flowing through the supplywater plenum.

FIG. 12 illustrates the toilet fixture of FIG. 11, with water flushingfrom the tank of the toilet to the bowl of the toilet, with the wallshielding the hole connecting the bowl to the supply water plenum fromthe water rushing through the supply water plenum. Supply water plenum560 is illustrated including channel 513, jet channel 564, and water jethole 566 supplying a water flow 593 to a primary drain inlet. Water flow593 is created by water level 590 within plenum 560. Bowl water level592 is illustrated below hole 575 connecting the bowl to the supplywater plenum 560. Diverting wall 532 is illustrated diverting water awayfrom secondary drain inlet 570, permitting some water to enter inlet 570but reducing the amount of water as compared to how much would flow intoinlet 570 if diverting wall 532 were not in place. Wall 572 isillustrated shielding hole 575 from the water 590 within the plenum,such that a water flow surface 591 under hole 575 remains below hole575, thereby preventing water from flowing out of hole 575 during anormal flush of the toilet.

FIG. 13 illustrates the toilet fixture of FIG. 11, with water backing upthrough the supply water plenum through both a bottom of the supplywater plenum and through the hole connecting the bowl to the supplywater plenum. Supply water plenum 560 is illustrated including jetchannel 564, and water jet hole 566 supplying a water flow 595 backingup from a primary drain inlet into jet channel 564. While diverting wall532 is illustrated above secondary drain inlet 570, flow 590 isunaffected by diverting wall 532 and can drain freely into secondarydrain inlet 570. Further, water level 594 within the bowl of the toiletfixture is illustrated above hole 575, resulting in water flow 596flowing through hole 575 and unimpeded past wall 572 to drain out ofsecondary drain inlet 570. Flow 597 going into secondary drain inlet 570is illustrated including water from both flows 595 and 596.

The disclosure has described certain preferred embodiments andmodifications of those embodiments. Further modifications andalterations may occur to others upon reading and understanding thespecification. Therefore, it is intended that the disclosure not belimited to the particular embodiment(s) disclosed as the best modecontemplated for carrying out this disclosure, but that the disclosurewill include all embodiments falling within the scope of the appendedclaims.

The invention claimed is:
 1. A toilet fixture that is fluidly coupled toa sewer drainage pipe, said fixture comprising: a bowl having a wastereceiving basin that includes an upper rim and which holds an amount ofwater at a certain water level and a supply water plenum providing saidwater to said basin; a primary drain fluidly connecting said basin andwhich terminates at a drain passage, a cylindrical outer surface and athickness between said outer surface and said inner surface and isfluidly coupled to said sewer drainage pipe; a secondary drain fluidlyconnects said supply water plenum to said sewer drainage pipe, saidsecondary drain is separate from said primary drain and including: atleast one secondary drain inlet that is disposed within said supplywater plenum at a location above said certain water level of said basin;a second drain channel, in fluid communication with said secondary draininlet, having a water trap; and a second drain outlet that is in fluidcommunication with said second drain channel, whereby said secondarydrain inlet permits rising waste water to flow from said supply waterplenum into said second drain channel and out of said second drainoutlet to said sewer drainage pipe separately from the waste water ofthe primary drain; a diverting wall located upstream of the secondarydrain inlet configured to divert water flowing from upstream fromflowing into the secondary drain inlet.
 2. The toilet fixture of claim1, further comprising a hole connecting the bowl to the supply waterplenum.
 3. The toilet fixture of claim 2, further comprising a wallextending within the supply water plenum shielding the hole connectingthe bowl to the supply water plenum and preventing water from flowingthrough the hole connecting the bowl to the supply water plenum during anormal toilet flush.
 4. The toilet fixture of claim 1, furthercomprising a plurality of secondary drain inlets.